Angles in a Triangle/Transversal

Front

What is the definition of a right angle?

Back

A right angle is an angle whose measure is exactly 90 degrees.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

If one angle in a triangle measures 50 degrees, what is the sum of the measures of the other two angles?

Back

130 degrees.

Front

What is the relationship between angles formed by a transversal intersecting two parallel lines?

Back

Corresponding angles are equal, alternate interior angles are equal, and consecutive interior angles are supplementary.

Front

How do you find the measure of an unknown angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the equation for the sum of angles in a triangle?

Back

m∠1 + m∠2 + m∠3 = 180 degrees.

Front

What is the measure of an angle that is supplementary to a 65-degree angle?

Back

115 degrees.

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

If two angles are complementary and one angle measures 30 degrees, what is the measure of the other angle?

Back

60 degrees.

Front

What is the formula to find the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two opposite interior angles.